#183A83#183A83

#183A83 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.1% C 0.129 H 262.9°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#183A83
RGB	rgb(24, 58, 131)
HSL	hsl(221, 69%, 30%)
HSV	hsv(221, 82%, 51%)
CMYK	cmyk(81.7%, 55.7%, 0%, 48.6%)
CIE-LAB	lab(26.33, 16.48, -44.54)
CIE-LCH	lch(26.33, 47.49, 290.30°)
OKLab	oklab(37.07% -0.016 -0.1284)
OKLCH	oklch(37.07% 0.129 262.9)
XYZ	xyz(5.9850, 4.8583, 22.0906)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A83 #836118

analogous

#186F83 #183A83 #2C1883

triadic

#183A83 #83183A #3A8318

tetradic

#183A83 #83186F #836118 #18832C

square

#183A83 #83186F #836118 #18832C

split-complementary

#183A83 #832C18 #6F8318

monochromatic

#050C1C #0F234F #183A83 #2151B7 #3A6DDB

Accessibility & contrast

On white

10.65

#183A83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#183A83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A83

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A83	#FFFFFF	#000000	##FFFFFF
##183A83	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004386

Deuteranopia (green-blind)

#003A82

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183a83;
/* rgb */ color: rgb(24, 58, 131);
/* oklch */ color: oklch(37.1% 0.129 262.9);

Tailwind

colors: {
  custom: {
    50: '#686fa8',
    500: '#183a83',
    950: '#000000',
  },
}

SCSS

$custom: #183a83;
$custom-light: #686fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#183a83",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 131
  },
  "hsl": {
    "h": 220.935,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37066,
    "c": 0.12944,
    "h": 262.9
  },
  "luminance": 0.04859
}

Semantic roles & 50–950 ramp

primary

#183A83

secondary

#B79140

accent

#B43CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183A83

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →